Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Amortized intangible assets [Abstract]
Gross carrying value	$ 16.4	$ 16.8
Accumulated amortization	(8.2)	(6.9)
Net intangible assets	8.2	9.9
Amortization expense	1.6	1.6	$ 0.8
Estimated future amortization expense [Abstract]
2017	1.6
2018	1.6
2019	1.5
2020	1.3
2021	0.8
2022 & Beyond	1.4
Trade Names [Member]
Amortized intangible assets [Abstract]
Gross carrying value	8.9	9.1
Accumulated amortization	(6.3)	(5.8)
Net intangible assets	2.6	3.3
Acquired Technology [Member]
Amortized intangible assets [Abstract]
Gross carrying value	5.5	5.6
Accumulated amortization	(1.5)	(0.9)
Net intangible assets	4.0	4.7
Customer Relationships [Member]
Amortized intangible assets [Abstract]
Gross carrying value	2.0	2.1
Accumulated amortization	(0.4)	(0.2)
Net intangible assets	$ 1.6	$ 1.9